Automatic multiple-chuck drill-press.



'J. N.ILANDAU. AUTOMATIC MULTIPLE CHUCK DRILL PRESS. APPLICATION AFILED MAY 21, 1913. JLTOLLE) l 7. PatenneaJuly 21, 1914.

J. N. LANDAU. l AUTOMATIC MULTIPLE CHUCK DRILL PRESS.,

' NPPLICATICN HLUD MAY 21,1913.

,4TTORNEVS J. N. LANDAU. AUTOMATIC MULTIPLE CHUCK DRILL PRESS. APPLICATION FILED MAY 21.1913. v' l 1&10451'7 VPatented July 21, 19,14.

s sHELTls-sHBBT s. f/ 53 4/ WEZ i 70456/7171 M' W JOSEPH N. LANDAU, F NEW YORK, N. Y.

AUTOMATIC MULTIPLE-CHUCK DRILL-PRESS.

arcani a.

Specication of Letters Patent. Application filed May 21, 1913.

rar-entes tary er., ier/a. Serial N0. 768,901.

To alt whom it may concer/zy Be it known that I, JOSEPH N.

citizen of the United States; and a resident of the city of New York, borough of Man hattan, in the county and State of New York, have invented a new and Improved Automatic hlultiple-Chuck Drill-Press, ot' which the following is a full, clear, and eze act description.V

This invention relates to improvements in drill presses and -more particularly those used in metal work.

The primary object oi" the invention is to provide an automatic multiple chuck drill. press in which either of the chucks or toolholding devices may be brought into successive coupling position to be rotated or operated from a single. working spindle; the improvement being designed to be applied to machines which. new' generally constructeffl, or to a machine having a specially mounted and driven spindle, as will be hereinafter described.

A further object of the invention. is to provide a drill press ot the character described which includes, in combination with a sul'iporting standard and. an arm carried thereby, a spindle rotatably carried by the arm and supported against unduefriction,

improved driving means for the spindle in? cluding means for tightening an endless drive member and for of for different changes ot'fspeed, and a chuck-carrying magazine or casing movably carried by the arm, the spindles of the chucks having means cooperating with the working spindle, whereby upon shifting ot the latter vertically, either one of the chuck spindles may be coupled thereto and rotated, thus permitting the use of a plurality of tools or implements upon the same machine with extreme simplicity of operation and convenience. y V

A still further object of the invention is to provide means for normally elevating the working spindle of the machine so as to uncouple the same with relation to the chuck spindles, and means for normally holding a shitting member' for the magazine or casing in position to bring and hold one of the chuck spindles into coupling position, the latter being supported in close proximity to the working spindle for convenient coupling operation.

lVith the above and other objects in view7 the invention resides more particularly in the peculiar combination and arrangement LANDAU, a ferred embodiment in the alining the laps there- A of parts which will be illustrated as a preaccompanying drawings and described in the specification.

Reference is to be had to the accompany ing drawings forming a part of this specilication, in which similar characters of rei"- erence indicate corresponding parts in all the views, and in which- Figure 1 is a side elevation of my proved automatic multiple chuck drill press; Fig. 2 is a plan view; Fig. 3 is an enlarged cross sectional view taken through the magazine of the chuck holder and the means for holding the movable part or' the magazine in its operative positions; Fig. 4 is an enlarged fragmentary vertical sectional view of the upper part or" the machine with a part of the standard and theheaol and arm'ot' the latter in elevation; the spindles being uncoupled; Fig. 5 is an enlarged vertical sectional vicw or an arm for turning the'chuck magazine and Afor holding the latter nor mally aga-inst movement; Fig. 6 is an enlarged horizontal. sectional view partly fin elevation of the alining device and belt shifter; F 7 is a vertical sectional view through a casing containing the spring for normally holding the working spindle elevated, the shaft disposed in mesh with. the spindle being also shown in section; Fig. 8 is an enlarged vertical sectional View of fragmentary portions of the Working spindle and a chuck spindle, showin a moditied form or coupling means there or; Fig. 9 is a plan view of the parts illustrated in 8; ldig.` l0 is a horizontal sectional view through the casing shown in Fig. 7; the

arm and means for raising and lowering the working spindle; Fig. ll is an elevation of fragmentary portions of the working spindle and a chuck spindle,l showing a modified form of coupling device; Fig. l2 is a fragmentary side elevation of a portion of the machine showing a modied manner-of supimrtiirgg` the chuck magazine upon a modified :Form oi standard; Fig. 13 is a` plan view oit the structure illustrated in Fig. l2, fragmentary portion of the magazine being shown in section: and FigA lt is a tragmentary front elevation of the chuck marrazine showing a spring detent for anchoring the movable part of the magazine when one of the chuck spindles is iir'eoupling position.

In the drawirigs the numeral 10 indicates the supporting pedestal or standard of the improved'drill press which is carried by or supported upon a base 11,the said standard.'

carrying the vertically and laterally adjust- Y able work support or table 12 having a split sleeve portion -13 provided with extensions .14,capable of being drawn into binding engagement with the standard through the instruinentality -of a clamping screw 15 operable by a turning bar 16. r1`his table is preferably of circular form in plan, as illus- '.trated, and is provided with 'a central opening 17 through which the operating tools may be projected to prevent injury thereto.

Mounted on the upper en d of the standard y vlO'is a head casting 18 which isprovided .withforwardly extending vertically spaced parallel bearing arms 19, such arms being disposed in horizontal position. The opposite Side of the head is provided with a d'e-l I pending and laterally extending arm 20, in

turn provided with a longitudinal bore 21@` serving. to support a stub shaft 224 for longitudinala'djustment. To accomplish this ady justment the stub shaft 22 removably carries a threaded stem which extends laterally throul h a longitudinal slot 24 in the arm 20,

there eing a binding nut25 engaged on the screw to hold the stub .haft in any position of longitudinal adjustment for a purpose to be hereinafter made apparent. At the opposite side of the arm 20 a bracket 26 is proprovided with an upwardly curved fork 31,

between the tines of which one vertical lap of an endless drive member or belt 32 extends, the rod being designed to be shifted l'ongitudinallv for changing the position of the endless drive member with respect to a loose pulley 33 and a tight pulley 34 for throwing the machine into and out of opera tion. These pulleys are mounted upon the stub shaft and fixed to the pulley 34 is a pulley 35 around which a drive member is engaged from a suitable source of power for operating the machine. j

- J ournaled in the bearing portion 36 of the uppermost of the arms 19 is a sleeve 37, the same having a peripheral groove 33 receiving the inner extremity of a set screw 39 engaged through the bearing portion, and this sleeve in turn is provided above the bearing portion with a large pulley 40 and a small pulley 41, preferably1 formed integral with the sleeve and designed to be rotated by en gagement of the endless drive member 32 there-around. The small pulley is designed for increasing the speed of rotation'ofthe sleeve and Working parts xed to the latter, as will be hereinafter described, while the vpulley 40 is for'l a reduced speed, and since the 'pulleys are of different diameters, it is apparent that means must be provided for taking up the slack in the endless drive member 32, which latter is preferably of Icircular cross section.` For this purpose the head 18 is provided with an upwardly and rear wardly extending arm 42 terminating in a bearing sleeve 43 in which a cylinder 44 iS turnable, the. said cylinder at its opposite ends having removably secured thereto, at i eccentric points located in coincident \rela' tion, removable stub shafts 45 each carrying a grooved pulley 46. The laps of the belt or endless drive member 32 are passed around either of the pulleys 33 or 34 and then over the pulleys 46 and around either of the pulleys 40 or 41, dependingy upon whether the device is operative or inoperative and also the speed at which it is desired to rotate the working parts; The slack in the belt is taken up by turning the cylinder44 to vary the degree of clistention of the pulleys 46, such cylinder being capable of movement through the instrumentality of a rigid projection or arm 47 and capable of being held in adjustable position thro igh the instrumentality of a set screw 43 operating through va boss in the bearing sleeve 43. During this adjust-y ment the vertical laps of the endless drive member will be moved to either side of the vertical so that by adjusting the stub shaft 22 longitudinally in the manner heretofore described, the pulleys 33 or 34 lmay be brought directly beneath the peripheral portions of the pulleys 46 contacted by the endless drive member and the laps thereby disposed in vertical alinement.

From Fig. 4 of the drawings it will be observed that the sleeve 37 is enlarged to support it for rotation upon the upper bearing 36, but in order to positively supportv the sleeve for rotation against undue friction, a bearing seat. 49 is removably secured in the lower end of the bearing 36, as by threading the same thereinto, interposed ball bearings 50 being mounted on the support and between the latter and the lower end of the sleeve 37, so as to rotatably support the latter.

The main operating or working spindle of the machine is indicated by the numeral 51, and has a reduced upper portion 52 extended through the sleeve 37, invturn provided with a' longitudinal keyway 53 engaged by a set -screw 54 disposed at a convenient place dle independently of the sleeve but causes the former to rotate with the latter when the machine is 1n operation.

Fitted on the spindle 5l is a tube snugly operating in the bearing 56 of the lower arm 19 and having on its inner side a. plurality of teeth 57 forming a rack bar for engagement by a pinion 58 carried by a shaft 59 horizontally journaled through the bearing 5G, said shaft having` an enlarged portion` 60 for rotation within a sleeve 61 extending inwardly from a relatively flat cylindrical casing` G2 held in fixed relation to the bearing 56 by means of a set screw 63 extending upwardly through the bearing or otherwise passed through the latter and engaging the sleeve extension 6l. This casing' 62 carries a` coiled spring;` 64 which is fixed to its inner face, and which is also fixed to the shaft 59 in some manner, such as illustrated in Fig'. .7 of the drawings, whereby the spring4 normally tends to elevate the tube and the working spindle 5l carried (hereby. This latter operation may be effected owing to the fact that the lower end of the spindle is enlarged, as shown at 65, to provide a shoulder upon which thc lowcr end of the tube rests and is held against downard displacement, while a pair of jam nuts 6G is mounted on the threaded portion 67 of the spindle to abut the upper end of the tube and resist upward displacement of the latter independent of the spindle; but it is apparent that by rotation ut an operating bar 68, which is fixed to the shaft 59 through the instrumenitality of a socket head 69, the shaft and pinion carried thereby may be y'lnotated in mesh with the rack 5T so as to positively raise or lower the spindle.

The head 18 is provided with a depending stem 70, and carried by this stem or removably secured thereto by an attachingscrew 7l, is the stationary section Z2 of. a magazine or casing, the same havin.;- a neck portion- 72S abutting the lower edge oit the bearing 56, such neck portion being interiorly hollowed out for rcceiviim` the lower end oi' the operating` spindle 5l therethrough. 'lhe lower end of the spindle, as shown in Fig'. 4 of the drawings, is slightly enlarged in diameter below the tube 55, and is provided at diametrically opposite points with vertical recesses 74 in which a pair of coupling' pawls 75 are pivoted intermediate their ends, the upper ends ot the pawls being' beveled at their outer edges, as shown at 7G, while the lower ends of. the pawls are provided with in 7ard extensions 77 normally held toward each other by means of a coiled springI T8 mounted in av transverse bore through the spindle connecting' the pawls, so as to exert outward pressure against the upper portions of the latter.

The engaging portions 7T of the pawls areB held out bt operative position when the spindle elevated, and for this purpose a split. ring' 79 of wedgeshapcd cross section is fitted in the hollowed-out part of the neck l. l l l raised the points, slightly portion 7 3 with ball bearings 80 between its upper edge and a shoulder formed by said hollowcd-out portion, the wedge-shaped cross section ol the ring,lr providingan terior beveled face slol'iing` outwardly and downwardly, whereby when the spindle is beveled ends 7G of the pawls will' be brought into engagement with the ring 'and forced toward cach other against the action of the coiled spring '78,.constituting resilient means for normally holding' said ends outward. During this movementthe 'friction due to the cotact of the parts is taken up by the ball bearings 80, and since the ring' 79 free to rotate within the neck portion ofiA the magazine or casing 72, the spindle, together with the pawls carried therel i iy, will rotate `without undue friction. The bearings 8O and the ring' 79, which is preferably ofi' hardened steel, are hold in position by a bushing' 8l threaded into the hollowed-out portion or neck of the stationary section of the magazine from the under side, such bushing` contactingI with the ring` and supporting the latter and the bearings The stationary section of the magazine below said neck portionI is hollowed out to provide a surroundingl ,wall and an interior shoulder 82 facing` downward, and said staftionary section receives a movablesecton which has a reduced upper portion 84e snugly fitted therein and contacting at its upper edge with tle shoulder S2. These parts are keyed for independent increment so as to prevent displacement of the movable section S3 downwardly, such as by means of a coupling` ring` 85 fitted in cti-acting lgrooves in the contacting faces of the stationary and movable sections of the magazine, such couplingv ringbeing fitted endwise into position after the parts are assembled in the manner described, through an opening;` 86 inthe front part of the stationary section.

Iotatably fitted on the reduced upper portion 8l of the movable section is an operating band S7, such band being' disposed between the lower edge of the stationary seetion and a Shoulder 88 formed by the reduced portion 84, and which holds the support for the band as shown in Fig. e of the d rawings. The band is designed for turning the movable section 83 of the magazine to bring either end of' a plurality of chuck spindles into vertical alinenient 'with the working` spindle to be coupled to the latter, and for this purpose the reduced portion 84 is provided at equi distantly spaced above the upper edge ot the band 87, with circular apertures or openings 89 correspoiuling to the number of chuck spindles carried by the magazine, and located on radial lines coincident with the centers of such chuck spiiu'lles, which are indicated by the numeral 90.

The reduced portion S4c is further provided at equi-distantly spaced points with horizontally disposed elongated slots 91, centrally located with'respect to the width of the bandl and to one side of the openings 89 or the centers of the chuck spindles in the ingly interiorly threaded bore, andv said hani dle isprovi-ded with a .smooth longitudinal having enlarged end portions to be engagedy bore 95 having an end wall'96, but j arovidtd', through la restricted aperture terminating in a socket or counterbore 97, with lcommunication with relation to a vertical slot 98 extending' through 'the handle neary its free end. A pin 99- is movable longitudinally through the'handle and the aperture in the `stud 92, and this pin is provided with an enlarged portion 100 by whichit is guided in the enlarged counterbore 95, there Veing a coiled spring 101 disposed in the counte'rbore between the end wall and the enlargement to normally force the pin into one of the elongatedslots 91, while the outer end of the pi is ided in the socket 97.

onnected with th'e pin 99 and operating in the' slot 98 is a grasping bar 10,2, the. same by twovof the fingers forreleasing the pin from'one of the slots 91 against the .action of the spring 101 by exerting pressure on the handle with the thumb fand pulling outwardly on the bar 102 with the first fingers,

lthereby permitting the band to turn inde-l pendently of the movable section of the. magazine. Cooperating with the apertures 89 is a spring detent 103, the same being mounted in a barrel 104 formed at the lower end of a bracket 105 secured to ,the front portion of the stationary section of the magazine at two points, as shown at 106, so as' to hold the same from lateral swing. The

" barrel 104 is provided with a reduced end aperture through which the outer end of the detent operates, and such detent is provided with an enlarged portion 107 snugly fitted in the `counterbore of the barrel and further provided with a reduced portion 108 around which a coiled spring 109 is disposed, so as to exert pressure between the end wall of the barrel and the shoulder formed by the enlargement 107, and thus hold the detent engaged with one of the apertures 89 through an alined aperture mythe stationary section of the magazine, thus tend'ingto hold the movable section against rotation with respect to the stationary section of the maga- Zine.

l'To permit rotation of the'movable section,-

the enlarged portion 107 of the detent at its lower portions is notched to providel a cam surface 110, and an adjacent portion of the bracket or barrel of the latter is also notched, as shown at 111, to accommodate a cam projection 112 carried by the band'87 and extending upwardly in front of the stationary section of the magazine. This cam projection is normally disposed to the left of the detent 103, and the pin 99 is engaged in one of the slots 91 in the position shown in Figs. 1, 2 and 3 of the drawings, so that it will be apparent that the handle 94 may be shifted to move the pin 99 in the slot 91, whereby the band will turn independently of the movable section of the magazine, and by causing the cam projection 112 to engage with the cam face of the detent, exert outward pressure against the enlargement of the latter and thereby disengage the detent from the adjacent aperture 89 in the movable section of the magazine. This operation is indicated more particularly in Fig. 3, the parts being shown in the initial position in dotted lines and in the shifted position in solid lines after the detent is disengaged from the adjacent aperture,v whereby movement of the movable section with'- the band, upon further rotation of the latter through the Vinstrumeifitality of the handle 911, will be permitted to bring the next chuck spindle in alinement with the working spindale 51. When the parts are shifted in this position any one of the chuck spindles may be used, and from the drawings it will be seen that the chuck spindles are mounted in an arc concentric with relation to the center of the movable section of the magazine,

which is in the form of a shell or casing- "open at its upper end.

These spindles are rotatably journaled in sleeves 113, each of which is mounted in a coacting vertical aperture 114 in the lower wall of the movable section of .the magazine, and .depending bosses 115 carried by or formed with the latter and corresponding in numberto the number of chucks and chuck spindlesdesired to be used. These sleeves are splined in position to prevent their rotation but to permit them to be freely adjusted vertically,

" the sleeves being provided with longitudinal keyways 116 each'receiving a key orset seated in a keyway. Mounted on the upper ends ofthe sleeves 1111 are bearing plates or washers 118 which are fixed to the sleeves, and by means of lcoiled springs or other supporting means 119 encircling the sleeves,fv

resting on the bottom wall of the movable section and exerting -upward pressure against saidl supporting; plates or washers,

lthe chuck spindles are held upwardly displaced, and chuck-receiving enlargements' 120, formed at the lower .argds of thespindles and tapered in conformity tothe bosses 115,

are held in` cont-act with the ,lower edges of the bosses.

115 f screw 117 engaged through each boss .and Y The tool-holding' devices or chucks are in- ,dicated by the numeral 121, and are of such types as to hold various Jforms of tools, each chuck constituting a tapered sleeve haring` a knurled turning` portion engaged on a tapered and split exteriorly threaded bushing 122, the shank portion of each bushing being flattened, as shown at: 12:3, whereby it may be held stationary by means ot a wrench or other implement to permit turning ot 'the sleeve with respect thereto in holding` or ree ,leasing a tool. The shanks ol the chucks are tapered, as shown at 124, and are. wedged in tapered sockets in the lower ends of the enlargements of the chuck spindles, whereby they are securely held in position. in order to couple each of the chuck spindles with the workingrgv spindle, when the former are brought into successive vertical. alinement 'with the working' spindle7 said working spindle and chuck spindles are provided with eo-acting or clutch heads in addit-ion to the pawlsi heretofore referred to.

ln the torni ot couplingl shown in Fig. Li. the lower extren'iity ot' theworking spindle is provided'with a pair of sockets 125, and the upper extremity ot each chuck spindle is provided with a. circular reduced portieri 12h to which is tixed a coupling head 127, as by means et' a set screw 1228, and each head is provided with a peripheral groove 129 adapted, when the working spindle is depressed. by the rack means heretofore de scribed, to be engaged by the extensions .77 oi." the pawls under thc action ot the springs 7S tending to spread the upper ends ot the pawls and thus move the engaging portions 'T7 together. This means provides for either one ot' the chuck spindles to be retained in cooperativo engagement with the 'working spindle but docs not provide loi"f;iiuulta neous rotation ot the two when the working spindle is rotated. However. for this purpose each head 127 is provided with .a plurality, preferably a pair, of vertical passages 129 ha ving a restricted upper end through which coupling' pins 130 are pro jected. said coupling' pins having' enlarged portions 131 operating in the passages and normally held ulnvardly disposed by means of coiled. springs 1232, there' being' adjustingl screws operating' in the lower erde et the passages within the area ot the plates or washers 118 to adjust the tension ol the springs and the degree ot engagement ot' the pins with the similarly located sockets 195 in the lower extremity ot the working spindle. 1n this position ot' the partsi a chuck spindle may he rotated and depressi-ul with the workingspindler` supported by the pawls 75, hut attera chuck spindle has been brought into vertical alinement with the working' spindle the pin 99 is disenpgagtul from the adjacent slot 9L and 4with the band and handle, is automatically turned to its initial position, whereby the next chuck spindle may be similarly positioned. For this purpose an angular bracket 134 is secured to the stationary section ot the magazine to lthe opposite side of the head with respect to the initial position of the handle Sel, and such bracket tornis a sui'ipolrt for a cylindrical casing- 135 which is removably attached thereto by a clamping screw 136, such clampingv screw also forming an anchoring i'neans tor one extremity ot'the hund spring 13T coiled within the casing, The tree extremity of the spring operates through a slot 138 in the casing and i.' anchored to the band 87, as shown at 139. Thus, when the band is rotated through the instruniientality .ot' the operating` handle 94, and the cani projection 112 causes the disengagement ot the detent 103 with respect to the adjacent aperture 89, further rotation ot the band due to the contact ot the pin 99 with the end wall of its engaged slot 917 will cause movement et the cani projection 112 beyond the detcnt, whereby the spring 109 will cause the same to engage in tlu` next aperture 85.) and hold the movable section oitv the magazine againsV inox/'ement'. Next, the pin tlf) is disengaged troni its slot U15 and under tension ol the 'spring- 137, which has been caused to wind within the casing, the hand will he returned with the handle to its initial position. and under the action ot the coiled springl 101 the pin will automatically engage the next slot 91, and this operation may he continued in a like manner tor presentinztgv either one oit the chucks into position to he coupled with the Working' spindle, dependingl upoir the particular work to he ellected.

in order to adapt the coupling device to machines ot ordinary design, in contra-distinction to a machine having a special form ot working` spindle, the structure shown in Fig. t is provided. The Working spindle is indiratcd hy the lower end is yprovided with a. tapered socket 141 receiving` the tapered upper extremity 142 of a coupling` head' 1421 corresponding i to the enf; rgg'eincnt ot the Working spindle 51. ln connection with this eonstriution, the couplingn means heretotore described rwy be enuiloyed. but as a modified forni ot coupling' means the head 11i-tl hasits lor-:er end termed with a tapered section receiving a tapered head 1.414 secured to the squared end 145 of a chuck spindle 'I4-(l, as by 'neans l ot' a set screw' 1117, and the neck portion ot' the head. 143 is provided 'with leaf springs 148 at diametrically oljiposite points. secured at their upper ends lo such I1ecli-p ution, as by means ol screws as illustrated, and these springs have their lower tree end extending' outwardly. At diametrically opposite points of lthe head, corresponding to drawn around withl the band and on lll@ such `head is provided with slots 149 in which pawls 150 are pivoted and provided with engaging portions similar to the pawls -.`75. The springs normally cause the pawls pling position.

to seat in a peripheral groove in the taperedl head 14A of the chuck spindles, whereby the heads are coupled, but when the Working spindle is shifted vertically such pawls are disengaged from the groove against the action of the springsfflt and thus uncoupling the working spindle the chuck spindles vrhay be brought to `couyA modified form of coupling is shown in Fig. 11 of the drawings, Where-in the parts are the same as illustrated in Fig. i except that the co-acting faces of the clutch heads instead of being provided with'sockets 125 and coupling pins 130, are provided with coacting rigid clutch Jfaces 151.

In Figs. 12 and 13 of the drawings a construction is shown whereby the magazine is adapted. for use with an ordinary drillin continuation of the purpose for which the `structure shown in Fig. 8 is provided. In these figures the magazine is of ordinary construction, but the standard 152 is provided upon opposite sides with triangular grooves producing a dovetailed member designedi'or slidable engagement by a bracket arm 153 which supports the magazineand permits adjustment thereof upon the standard. In this construction thev magazine is held in an operative position by engagement of a clam ing screw 154 through the spindle and the bracket arm 153.

From the foregoing description, in connection with the accompanying drawings, it will be apparent that I have provided a vdrill press which possesses points of advantage both in simplicity ot structure and operation, as Well as durability, it being obvious that the speed of rotation of the worki ing spindle may be quickly changed and the changes in the position o't' the working member or tool readily compensated for, while the spindle is supported for rotation in a simple and novel way against undue friction and yet permitted to be adjusted vertically by the rack means provided, which normally holds the spindle in an elevated position and causes the automatic separation of-the coupling pawls by. which a chuck spindle may be coupled to the working spindle for the working operation. Fun ther advantage is derived by reason of the provision of a plurality of chucks and the structure by which the device may be applied to machines as now constructed or those having a specialvform of head and working spindle, as well as the provision of a mechanism carrying a plurality of chuck spindles and chucks for holding a number of tools which may be successively whereby another of l .'tor normally shifting 'used in aparticular piece of work or vin different types of work without requiring.

changing of the tools with inconvenience and loss of much time. Further advantage is derived by reason rof the automatic return of the shifting band to an operative position after ,having been released by the operator without requiring the operator to move 'from his work, thus assisting in the presentation of a particular chuck into coupling position, while particular coupling means' provided permits the raising and lowering of the tool to engage or and especially wherein reverse rotation may be imparted to the chuck spindle for withdrawing a taping tool from the work operated on. -Having thus described my invention, what I claim as new and desire to secure by Let# ters Patent isz- Y 1. An automatic drill press emboi'ing the combination with a supportingv stan ard and a work support; of a head carried bythe standard and having avpair of vertibally spaced horizontal bearingV arms projectingtherefrom, i spindle rotatably journaled in said sleeves, means for rotating the spindle, a chuck spindle supported beneath the aforesaid spindle and adapted to receive a working tool, means associated the first-named spindie upwardly, means operable against the action of said last-mentioned means to shit the spindle downwardly, and coupling means for said spindles, said coupling means being-normally inoperative when the firstnamedz spindle is raised and operative swhen the spindle is lowered.

2. In a multiple chuck drill press, the combination with a supporting standard and a work support carried thereby; head carried by the standard and having bearing arms projecting therefrom, a spindle rotatably iournaled in said arms, means for rotating the spindle, supported beneath said spindle and compris ing a casing disposed horizontally at right angles to the spindle, a plurality of vchuckcarrying devices carried by said magazine and shi'ftable with a portion of the latter to present either one ot said devices in alinement with said spindle, and means for coupling said-spindle with either one of said devices.

3. In a multiple chuck drill press, the combination with a supporting standard; of a head carried by the standard and having bearing arms, a spindle rotatably'journaled in said arms and adapted for reciprocation, means for rotating the spindle, a magazine supported beneath said spindle, a plurality of chuck-carryin magazine and shi of said devices in alinement with said spinofa.

a closed magazine disengage the work, l when used for tapping,y

sleeves carried by the arms, a

with one of the sleeves devices carried by said table to present either `one dle, each device having a* spindle for reeiprocastion and provided with a elutch head at its upper end and each head havin.;Y a peripheral groove, the aforesaid spindle having a (1o-acting clutch head, and spring` pawls Carried by said latter head and actuated by reeilfiroeation of its spindle 'tor engagement with saidv grooves to hold the spindles against separation longitudinally when the heads are coupled.

4. .ln a multiple chuck drill press, the eombination with a supporting;` standard and a. work support earried thereby; of a head carried by the .standard and having bearing' arms lnfojectial therefrom, u movable spin-lle rotatably journaled in said arms, means 'For rotatiiio,l the spindle, a magazine supported beneath said spindle, a plurality ot ehuelt-eari.ving devices carried by said magazine and shiittable to present either one oli said tle'fires in alinement with said spindle, each deviee embodyiim,` a Ispindle movable in the maaar/:inej means to eonneet each latter spindle with said first-named spindle, means 'tor preventing' independent rotation or loinfitudinal separation ot the. spindles when connected. and means tor supporting the spindles ol said devices, whereby said spindles and 1he ehuelts ear'ied thereby may be depressed with the tirstenamed spindle.

5. ln. a multiple eliueltdrill press, the eon'ibination with a supporting` standard and a w'orh' support rarried thereby; et' a head carried by the standard and having' bearingv arms proieeted therefrom. a longitudinally sliittable spindle rotatably journalediu said arms. means tor rotating' the spindle. a magazine :aipported beneath said spindle. :i plurality ot' elnucleearrving4 devices earried by said magazine and shittable to presi ut either one otl said devices in alinement with said spindle. each deviee embodying' a spindle movable in the magazine, means 'for eonneeting the spindles when the same are iu eontaet, means ,for preventing' independent rotation or longitudinal separation ot the spindlesl when eonneeted` and means 't'or supporting' the spindles ot' said deviees. whereby said spindles and the '.fhuelcs earried thereby may he depressed with the tirst-named spindle, said lastnamed means normally holding` .said ehuck spindles elevated.

tl. lhe eomliination with the working spindle ot a -drill press; oti a easing' supported iu juxtaposition te said spindle. said easing comprising a stationary part and a movable part` a plurality ot' chuck-holding devices carried by the movable part ot said easing, and means whereby either ot said devices may be brought into coupling position with relation to the spindle.

7. The combination with the Working spindle of a drill press; of a closed eireular casing supported in juxtaposition to sald ada pted spindle and comprising a movable and a stationary part. a plurality of chuck-holding' deviees carried by the movable part of said easing concentric to the center thereof,

said easing` being rotatably supported,means :For holding' themovable part against movement when one ot the said devices is in alinenient with the working spindle, said means beingcarried by the stationary .part and eugageahle with the movable part, andi means operated upon the depression of the workiln;- spindle to couple the alined devices.

8. The eombination with the Working. spindle ot' a drill press; of a casing supported in juxtaposition to said spindle, a. plurality ot ehueli-holding, devices carried by said easing, said easing being rotatably sapported, means carried by a stationary part and engageable with the casinggyfor holding' the easingagainst rotation when one ot the said devices is in alinement With the working` spindle, and means operated upon movement ot' the working spindle in an operative direction to couple the alined devices.

0. The combination with the working spindle ot a drill press; of a easingr supported in juxtaposition to said spindle, a plurality of chuck-earrying devices carried b v laid easing, said easing being rotatably suppriirted. vmeans for holding` the easing against movement when one of the said devices is in alinement with the working spindle. nreans whereby the easing may turn eaeh device and the workinga spindle havingeti-acting eluteh heads, means for locking said `heads successively with respect t a .single eliuelc-earryingdevice, and means normally returning said easing` turning means to its initial position.

l0. ln a multiple chuck drill press, a standard suitably supported. a head carried by said standard and provided with a plurality ot' bearing' arms, a working spindle earried by certain ot said arms, drive means earried by the spindle and the other of said arms 'tor rotating the spindle, a magazine havin;y a hollowed-out neck portion receiving the -tower end ot' the spindle, a beveled ring' carried by said neck portion, bearings earried by one of said arms and in said neck portion. means for adjusting the spindle vertieally. said bearings taking the end thrust of Said adjustments, a plurality of tool carrying spindles rotatably supported with respect to the magazine and adapted t0 b e independently arranged beneath the spindle. spring means for securinga tool Carrying; spindle against. downward displacement relative to the first named spindle and means whereby said spindles will rotate as one upon rotation being imparted to the first named spindle.

11.111 `a multiple chuck drill press, a

l spindle vertically,

standard suitably supported, a head carried by rality of bearing arms, a working spindle carried by certain of said arms, drivevineans carried by the spindle and theother of said larms', for rotating the spindle, a magazine having a hollowed-out neck portion receiving the lower end of the spindle, a beveled ring carried by said neck portion, bearings carried by one of said armsv and in said neck l independently arranged beneath the working spindle, spring means for securing the tool-carrying spindlesagainst downward displacement relative spindle when in the position named and means to icause simultaneous rotation o the working spindle and the dles upon rotating being imparted to the working spindle.

12. In a multiple chuck drill press, a standard suitably supported, a head .carried by said standard and provided with a plurality of bearing arms, a working spindle carriedl by certain of said arms, drive means carried by the spindle and the other. of said arms for rotating the spindle, a magazine having a liollowed-out neck portion receiving the lower end of the spindle, a beveled ring carried by said neck portion, bearings carried by one of said arms and in said neck portion, a bearing sleeve fixed to the spindle, said sleeve being movable in the lowermost of said bearing arms in which the spindle is journaled and provided with a rack at one side, a shaft journaled in said bearing arms and having a pinion meshing with said rack, a spring suitably anchored and connected to the shaft for positively rotating the same and to raise the spindle, a movable section carried by tlie'rnagazine and chuck carrying spindles carried by the movable section and adapted to be independently arranged beneath the working spindle, said latter spindles beingl 'located on the same horizontal plane. d*

13. .ln a multiple standard suitably supported, a head carried by said standard and provided with a plurality-oi` bearing arms, a working spindle carried by certain of. said arms, drive means carried by the spindle andthe other of said arms for rotating the spindle, a circular cas- 'fing supported adjacent to the spindle and comprising a stationary section having a hollowed-out neck portion receiving the said standard and provided with 'a pluto the first namedtool-carrying spin-l l groove chuck drill press, a

lower end of the `spindles,'a movable section carried by the stationary section,

rotatably chuck yspindles carried by the movable section, a band movable onthemovable sec` tion, means carried by the band for engaging. the movable section at spaced points for causing a partial rotation of the latter and means Vfor locking, the spindle with, the chuck spindles` arranged there-beneath.

14. In a multiple chuck drill press, a standard ,suitably supported, a head carried by said standard and provided with a plurality of bearing arms, a workingspindle carried by certain of said arms, drive'means carried by the spindle and the otherof'said arms for rotating casing supported adjacent to the spindle and comprising a stationary sectionhaving a hollowed-outneck portion receiving the lower` end of the spindles, a movable section,

rotatably carried by the stationarysection,

the spindle, a circular chuck spindles carried by the movable section, a band movable on the movable section, ing the movable section at spaced points for causing a partial rotation of the latter, spring means for returning the band to its initial position upon release of the said shifting means and means spindle with v.the chuck spindles arranged there-beneath. o

15. The combination with the working spindle of a drill press and a movable support arranged there-beneath; of a-plurality of. sleeves carried -by the support, said sleeves being adapted for vertical movement but held against rotation, spindles journaled in said sleeves, fixed to the upper end of each spindle, the working spindle and each of lthe last-named spindles having (zo-acting coupling faces, pawls pivoted at opposite faces of the working spindle, each head having a groove for engagement by said pawls, spring. means carried by the working spindle to exert outward pressure against pawls to cause their lower ends to engage the of one of the spindle heads and means to disengage the spindles.

16. The combination with the working.

spindleof a drill press adapted for vertical adjustment and a movable support arranged there-beneath; of a plurality of sleeves car- `ried by the support, said sleeves being adapted for vertical movement but held against rotation, spindles journaled in said sleeves, a coupling head fixed to the upper end of each spindle, the working spindle and each of the last-named. spindles having co-acting coupling faces, pawls pivoted at opposite faces of the working spindle, each head having a groove for engagement by said pawls, spring means carried by the working spindle to exert outward pressure against the upper ends of the pawls to cause their lower ends a coupling head' the uppe'r ends of the for locking the to engage the grooves of one of the spindle heads, and means carried by said support to cause the upper ends of the pavvls to move toward each other'against the action of the spring means, whereby the lower ends thereof .will be released upon raising of the vvor ing spindle. L

17. The combination With the Working spindle of a drill press and a movable support arranged there-beneath; or" a plurality of sleeves carried the support, said sleeves being adapted for vertical movement but held against rotation, spindles journaled in said sleeves, a coupling head fixed to the uppe'r end of each spindle, the Working spindle and each of the last-named spindles having (zo-acting coupling fac s, pavvls pivoted at opposite faces of the Working spindle, each head having a groove for engagement by said pawls, spring means carried by the Working spindle to exert outward pressure against the upper ends of the pavvls to cause their lower ends to engage the groove of one of the spindle heads, the lower ends of the spindles having enlarged portions, and chucks carried by said enlarged portions.

18. The combina-tion With the Working spindle of a drill press and a movable support arranged there-beneath; of a plurality of sleeves carried by the support, said sleeves being adapted for vertical movement but held against rotation, spindles journaled in said sleeves, said support comprising a stationary section receiving the Working spindle and a movable section carrying` the lastnamed spindles, said'movable section being liolloi'ved out, and means arranged Within the movable section for normally elevating the spindles for operative engagement With the Working spindle.

19. The combination with the ivorking spindle of a drill press and a movable support arranged there-beneath; of a plurality -of sleeves carried by the support, said sleeves being adapted for vertical movement but held against rotation, spindles yournaled in said sleeves, said support comprising a stationary section receiving the 'Working spindle and a movable section carrying the lastnamed spindles, said movable section being liolloived out, means arranged Within the movable section for normally elevating the spindles for operative engagement with the working spindle, said movable section having depending bosses in which the sleeves are mounted as described, enlargen'ients at the lower ends of the spindles conforming to the contour of the bosses, and chucks carried by said enlargements.

. 2G. The combination with the Working spindle of a drill press and a movable support arranged there-beneath; oi a plurality of sleeves carried by the support, said sleeves being adapted for vertical movement but held against rotation, spindles journaled in said sleeves, said support comprising a stationary section receiving the Working spindie and a movable section carrying the lastnanied spindles, .said movable section being holloived out, platesat the upper ends of the sleeves, and springs encircling the sleeves between the movable section of the support and the plates to hold the spindles resiliently elevated and permitting them to be depressed with the working spindle.

2l. lfn a multiple chuck drill press, a standard suitably supported, a head carried by said standard and provided with a plurality of bearing arms, a Working' spindle carried by certain of said arms, drive means carried by the spindle and the other or" said arms for rotating the spindle, a circular casing supported adjacent to the spindle and comprising a stationary section having a liolloWed-out neck portion rotatably carried by the stationary section, chuck spindles carried by the movable section, a band movable yon the movable section, means carried by the band for engaging the movable section at spaced points for causing a partial rotation of the latter, means carried by the stationary section and engaging' the movable section to hold the latteragainst movement when shifted, said means being releasable upon subsequent operation of said shifting ii'ieans and means for locking the lWorking spindle with either of the chuck spindles.

ln a multiple chuck drill press, a supporting frame, a spindle journaled in the frame, a circular casing supported adjacent -to the spindle and comprising a stationary section having a portion thereof rcceiving one end of the spindle, a movable section rotatably carried by the stationary section, a band movable on the movable seotion and stationary section, said movable section having a plurality of equi-distantly spaced apertures, chuck carrying spindles supported concentrically in the movable part of the casing, co-acting coupling means carried by the spindles lirst and last mentioned, a spring detent-carried by the stationary section and engageable through the latter to enter any one of said apertures oi the niovable section and hold the latter normally against movement and a projection carried by the movable section to discngagc the detcnt upon shitting of the movable section.

ln testimony whereof l have signed my naine to this speciiication in 'the presence of two subscribing witnesses'.

JUSERH N. LANDAU. lV i tnesses JOHN lil linnen, lliiinir l). llVoLLIiAUs-,

lOl) 

